| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] to [be] [verb] | 3037 |
|
| 2 | must be [vb pp] to [be] | 70 |
|
| 3 | must be [vb pp] to [verb] | 6 |
|
| 4 | must be [vb pp] [be] [verb] | 5 |
|
